Milling machine



Jana 1,1924 mmma i. T. HOWARD MILLING MACHINE Filed Dec. 22, 1920 3Sheets-Sheet 1 [f4 Tffawwd Jan, 11, 1924 1,479, 0fi3 l. T. HOWARDMILLING MACHINE Fild Dec. 22, 1920 :s Sheets-Sheet B mum/70R Zia f/fawmdJan 1 m4 1,47%)73 I. T l-EDWARD MILLING MACHINE v Filed Dec. 22, 1920 3Sheets-Sheet 5 50 I 1 Flag Z74 fiwgrd Patented Jan. ll, E22 1.

entree snares warn IRA '1. HOWARD OF GOSHEN, INDIANA.

MILLING MACHINE.

To all whom it may concern:

Be it known that LIRA T. HOWARD, a

citizen of the United States, residingin- Goshen, county of Elkhart,State of Indiana, have invented certain new and useful 1m:

provements in Milling Machines, of which the following is aspecification.

My invention relates to improvements in planers, especially so-calledtype-high machines, and is particularly. designed to plane or dressstereotype and wood mounted cuts, or the like, to type height.

Other objects of my invention are mentioned and described herein.

The preferred embodiment of my invention is illustrated in theaccompanying drawings, in which Figure 1 is a top plan view of themachine; Fig. 2 is a section taken on the line 22 of Fig. 1; Fig. 3 isan enlarged section taken on the line 33 of Fig. 1; Fig. 4 is a fragmentshowing a section of the adjustable bearing on an enlarged scale; Fig. 5is a section in elevation on the line 55 of Fig. 4: when viewed asindicated by the arrows; Fig. 6 is an elevation of one end of thecutter; Fig. 7 is a section taken through the cutter diametricallythereof; Fig. 8 is a perspective view of the sliding table andadjustable rack; and Fig. 9 is a fragment in section showing the camlock.

Similar numerals of reference indicate like members throughout theseveral views on the drawings.

Referring to the drawings in detail, the numeral 1 indicates the machinepedestal which may have the flanged base 2 and the top flange 3. Thenumeral 4 indicates generally the carriage frame of the machine which isrigidly mounted upon the pedestal.

flange 3 and may be fastened thereto by bolts 5, or otherwise in anysuitable manner. The carriage frame 4: is provided with the two opposedupright bearing housings. 6, 6 adapted to contain the adjustablebearings of the cutter element 7, as hereinafter described.

Each of the housings'6 is provided with a block chamber 8 in which abearing block 9 is slidably arranged for vertical adjustment therein, ashereinafter described. Each block 9 is provided with a ball bearingchamber or recess 10 adapted to carry the ball bearing element whichcomprises the hub section 11, the ring section 12 and a plurality ofanti-friction balls 13, which structure is well known in the art. The

cutter element 7 is provided with the end spindles 14: and 15, upon eachof which spindles a hub member 11 is rigidly secured,

the spindle section 15 ofsaid cutter element being somewhat extended andprojecting.

through the aperture 16 formed in one of the housings 6 to enable thedrivingpulley 17 to be rigidly mounted thereon. Normally. there issufficient clearance between the up per andv lower walls of the aperture16 and the. spindle 15 to enable substantial vertical movement of thelatter when adjusted, as hereinafter described.

Each of the blocks 9 may be provided'with I an upwardly extending studor neck portion 18, a POI'tlOIl of-which is slidably mounted or arrangedwithin the bore 19 of the stud.

guide portion 20 carried by the housing 6, I

said guide portion 20 being externally threaded at 21, which threads areengaged by the threaded adjusting cap or nut 22.3

Numerals 23, 23 indicate a plurality of screws threaded into thehousings 6 below the blocks 9 and projecting upwardly into the lower endof the chamber 8 to engage the lower end of each block 9 for adjustmentand stop members. A coil tension spring 24 is carried by each of thescrews 23 and'bears against the lower end of the block 9, whereby theend of the stud 18 is projected upwardly and held against the cap member22. Obviously, vertical adjustment either way of the; block 9 may beeffected by the manipulation of the members 22 and 23, and when-down--wardly adjusted against the screw 23, the latter may be retracted toenable further downward adjustment of said block. In

such manner the cutter 7 may be elevated or depressed, as desired.

The block stud 18 may be provided with an oil channel 25, the upper endwhereof may be normally concealed by a detachable dust cap 26 screwedinto the member 22, the

lower end of said oil channel being incom munication with the chamber111' whichthe ball bearing element is disposed, whereby lubricant may befed to the latter. To prement to the lateral movement thereof,saidplatesbeing centrally apertured at 29 to permit the passage of the cutterspindles 14 and 15.- Each.; plate -27. may be provided with a pluralityof lugs 30,- 30'" to" which a guard or cutter cover plate 31 may befastened by screws 32, or otherwise to screen the cutter 7, and therebyprevent possible injury to the machine operator. Screyvs;28. may securethe plate 27 to block 9.

The carriage frame 4 i's%providedl with the horizontal parallel trackmembers 33 and 34 which may be rigidly connected at their: outeryends bythe:tr-ansyerse members or sections 35 andf 36. Numeral 371 indicates aworlrbea'ring table providech withithe parallel bearing r ailstwhichwmay be lashape'd in crosssection, 38 and 39 adapted to engage have saidscrewf un'ctio'n as a non-advancing:

screw when rotated in its bearingsi A handwheel 44fma y be mounted onthe extension of the screwto enable rotatio'n thereof by the operator'to move} the table 37 back and for-t-h be'n'eath-ithe cutter 7.

Forzr'emovablysecuring the work (stereotype) t'o'= be'planed on themovable table 37,

a pair offjsawtoothracks45 and 46i are provided, the former'beingrigidly secured to and. transversely of one endof the table by screws47. Theraclc 46 is disposed transversejly of thetOfp surface of thetable- 371 and is provided with the depending tonguedi members=-48- and4'9 at its op'po'site ends; the

tongues? 50 wl'1'ere'of project inwardly of the table-sides intoslots 51formed in the oppoisiteflsid'e:edges of theta'bl'e, in which slotssaidrack tongues are slidably arranged; A eamloek bracket52mayprojectfrom-the. rack 46 and have the cam face 53-on1its undersurface whifch cam face is spaced fromlthei table 37. A handled cammember 54 is=rotatably mounted beneath the cam face 2 53, said cam.having a" stub shaft-55 w which is journaled in the aperture56 inbracket 52 and provided also'with the handle 57 to enable manualactuation; ofsaid cam; @bviously, engagementnby the point of the cam- 54with? the camface 53- byrotatiomof the former effects a slight upwardlmovement of the. rack; 46; thereby clamping. or binding the rack tongues5'0 againsti the upper wall: of the table slots251gwherebythe rack isor. mayberelbasably locked: in any desired position mergers the -Vshaped recesses 59 therein at intervals;

therein, therecesses of each ridge being formed o-utof circumferential.alignment:-

with the' adjacent ridge recesses, whereby a staggered relation= of; theteeth in different.

sets is effected. The teeth are, then. sharpened by'bevelingthe toothedge at 60.

Thewidt-h of'the'recesses59'is less than thew idth of the cutting edgeof eachtooth disposed circumferentially adjacent, that is, just ahead ofand behind said recess, whereby the cutting plane-of the teeth overlapsslightly and effects a remarkably smooth finish to the work.

An electric motor. 61 is=provided for drivingthe cutter 7, which; motormay be'suitably mounted upon the bracket: 62, said 1no.--

tor having a driving'pulley 63 on the outer end of its driving shaft; Adriving'belt. 64*

operatively connects the motor: pulley 63 with the cutter driving pulley157 carried on the cutter spindle 15. p in the belt 63 the motor bracket62 is adjustab-ly mounted upon the pedestal boss 65 to which it may besecured by a headed screw or tap-bolt 66wliich. is threaded into saidboss and which engages. an elongatedslot 67 in. saidbracket, wherebyvertical movementof said bracket and motor may be effectedon'theinclined face of-said boss;

The preferred? construction ofthe housing 6 may include a detachable capmember 68 adapted to be fasteneditothe upper pontion of{ the housing bycap screws: 69, 69; to which cap thestudior'post member. 20 is:con--nect'ed-i or with which it may. be integrala The cap- 68 may includevthe upper end of the block chamber 8 and through which the block stud 18extends:

1. I n a machine of the character; de-

scribed, the' combination. of a worksupport, a rotary tool and a bearingstructure forthe' rotary tool, the structure including a.

housing, a bearing block, a bal1 -hearing'sup-. ported in said bearingblock, meansfor ad- For taking. up slack justi'ng the location of said:bearing block with respect to-the housing, and meanslfor.

adjustably limiting'the movement of; said:-

bearing block-,said last named means and'the bearing; block. beingprovided with a: lubricating passage, terminating on theibear ing' insaid bearing block said passage being;

remove straight and uninterrupted independently of the adjustment of thebearing block in the housing.

2. In a machine of the character described, the combination of a worksupport, a rotary tool, a support for the rotary tool including a ballbearing and a bearing block in which said ball bearing is mounted, aretaining disk adapted to prevent axial displacement of the ball bearingwithin the bearing block and a tool guard associated with said retainingdisk.

3. In a machine of the character described, the combination of a worksupport, a rotary tool, a bearing structure for the rotary tool,including a bearing block, a supportfor the same, a ball bearing withinthe bearing block, a retaining disk for the ball bearing attached tosaid bearing block, lugs on the retaining disk and a tool guardremovably connected to said lugs.

4. In a machine of the character described, the combination of a rotarycutter, a work supporting table, the table being provided with astatlonary abutment, a movable abutment, guiding elements at the edge ofthe table in engagement with portions of the movable abutment, and meanson the movable abutment, between said edges, for looking it inselectively determined position on the table.

5. In a machine of the character described, the combination of a rotarycutter and a work supporting table, said work supporting table includinga stationary abutment and having a pair of guiding grooves along itslongitudinal edges, a movable abutment, portions of said movableabutment being in engagement with said guiding grooves, and a lockingdevice, said locking device being adapted to vforce the movable abutmentupwardly against a wall portion of said guiding grooves.

6. In a machine of the character, de-

scribed, the combination of a rotary cutter and a work supporting table,said work supporting table including a stationary abutment, a movableabutment, and having guiding elements along the edges for the movableabutment, and a clamp adapted to lock the movable abutment inselectively determined position with respect to the stationary abutment,said clamp being carried by the movable abutment midway between theguiding edges of the table and being adapted to coact with the tablesurface in looking the movable abutment in selectively determinedposition.

7. In a machine of the character described, the combination of a rotarycutter and a Work supporting table, the work supporting table includinga stationary abutment, a movable abutment, guiding elements for themovable abutment, a cam lock bracket carried by the movable abutmentmidway between the edges thereof and having an inclined lower surface,and a rotary clamping head secured in said lug having an inclined uppersurface and adapted to coact with the surface of the table for lockingthe movable abutment against displacement.

8. In a machine of the character described, the combination of a frame,having a slanting wall portion, a rotary cutter, a work supportingtable, a motor, a bracket having a horizontal wall for supporting themotor and an inclined wall in engagement with the slanting wall portionof the frame, said slanting wall of the bracket being provided with aslot, and means extending through said slot into the wall portion of theframe for securing the motor adjustably in position with respect to thecutter.

In testimony whereof I have hereunto aflixed my signature this 20th dayof Dec, 1920.

IRA T. HOWARD.

